Transmission and Rear Axle Oils - 1934 Hudson

Old Fogey UK
Old Fogey UK Expert Adviser
in HUDSON

I'm about to do a complete change of the oils in the transmission and rear axle of my '34 H8.

I know that I have to use yellow metal friendly oils but I don't know if I need to use classic EP (Extreme Pressure) or classic non-EP - which is it ?

I don't use the car when the temperature is less than 40F, so can I use summer spec SAE oils all year round ?

Advice would be greatly appreciated, please !

David.

Comments

  • tigermoth
    tigermoth Expert Adviser
    edited March 20

    EP additives with certain sulphurs are very bad for yellow metals. GL-4 oils are yellow metal safe


    I do not change transmission or differential oils with seasonal temp changes.


    regards, Tom

  • Old Fogey UK
    Old Fogey UK Expert Adviser

    Thank you, Tom.

    You can get yellow metal safe EP oil here in the UK so I just wanted to check whether I needed it, but it seems I don't.

    Is GL-1 oil OK as well ?

  • tigermoth
    tigermoth Expert Adviser

    GL-1 is compatible with gearboxes that contain yellow metals


    regards, Tom

  • Old Fogey UK
    Old Fogey UK Expert Adviser

    Thank you again, Tom.

    I'm guessing I'll be safe using this one for the transmission and the axle ?

    80w90 Gear Oil Mineral GL-4 Yellow Metal Safe – Westway Oils

    Best wishes,

    David.

  • tigermoth
    tigermoth Expert Adviser

    Yes

    regards, Tom

  • Old Fogey UK
    Old Fogey UK Expert Adviser

    Thanks again, Tom.

    I've ordered a 5L can.

    D.

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